A Dual-Mode Terahertz Filter Based on a Metallic Resonator Design |
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Authors: | C J E Straatsma A Y Elezzabi |
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Affiliation: | (1) Ultrafast Optics and Nanophotonics Laboratory, Department of Electrical and Computer Engineering University of Alberta, Edmonton, Canada, T6G 2V4; |
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Abstract: | We present a metallic resonator fabricated on silicon capable of dual-mode operation at terahertz frequencies. The resonator
exhibits a notch plus stop band filter response or a notch filter response depending on the orientation of the incident electric
field with respect to the structure. The former results in two resonance features: one at 0.69 THz with a Q-factor of 3.7
and the other at 0.91 THz. The latter results in a resonance feature at 0.63 THz with a Q-factor of 5.7. Using 3D finite-difference
time-domain simulations, the resonator is designed to operate between 0.1 and 1.4 THz. Experimental verification is performed
using a free space terahertz time-domain spectroscopy system, and agreement with our simulations is realized. |
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